[tex]\boxed{\begin{array}{l}\underline{\rm D~\!\!efinic_{\!\!,}\tilde ao~de~func_{\!\!,}\tilde ao~de~1^o~grau}\\\sf \acute e~toda~func_{\!\!,}\tilde ao~de~\mathbb{R}\longrightarrow \mathbb{R}~d~\!\!efinida~por\\\sf f(x)=ax+b,onde~a,b\in\mathbb{R},a\ne0.\\\sf a\longrightarrow coeficiente~angular\\\sf b\longrightarrow coeficiente~linear\\\sf f(x)=3+2x\\\sf a=2~~b=3\\\sf coeficiente~angular:2~~~~coeficiente~linear:3\end{array}}[/tex]
